316 lines
11 KiB
Groff
316 lines
11 KiB
Groff
.\" Copyright (c) 1996
|
|
.\" Mike Pritchard <mpp@FreeBSD.org>. All rights reserved.
|
|
.\"
|
|
.\" Copyright (c) 1983, 1991, 1993
|
|
.\" The Regents of the University of California. All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 3. All advertising materials mentioning features or use of this software
|
|
.\" must display the following acknowledgement:
|
|
.\" This product includes software developed by the University of
|
|
.\" California, Berkeley and its contributors.
|
|
.\" 4. Neither the name of the University nor the names of its contributors
|
|
.\" may be used to endorse or promote products derived from this software
|
|
.\" without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" @(#)mtio.4 8.1 (Berkeley) 6/5/93
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd February 11, 1996
|
|
.Dt MTIO 4
|
|
.Os FreeBSD 2.2
|
|
.Sh NAME
|
|
.Nm mtio
|
|
.Nd
|
|
.Tn FreeBSD
|
|
magtape interface
|
|
.Sh DESCRIPTION
|
|
The special files
|
|
named
|
|
.Pa /dev/[nr]sa*
|
|
refer to SCSI tape drives,
|
|
which may be attached to the system.
|
|
.Pa /dev/[nr]sa*.ctl
|
|
are control devices that can be used to issue ioctls to the SCSI
|
|
tape driver to set parameters that are required to last beyond the
|
|
unmounting of a tape.
|
|
.Pp
|
|
.Pp
|
|
The rewind devices automatically rewind
|
|
when the last requested read, write or seek has finished, or the end of the tape
|
|
has been reached. The letter
|
|
.Ql n
|
|
is usually prepended to
|
|
the name of the no-rewind devices.
|
|
.Pp
|
|
Tapes can be written with either fixed length records or variable length
|
|
records. See
|
|
.Xr sa 4
|
|
for more information. Two end-of-file markers mark the end of a tape, and
|
|
one end-of-file marker marks the end of a tape file.
|
|
If the tape is not to be rewound it is positioned with the
|
|
head in between the two tape marks, where the next write
|
|
will over write the second end-of-file marker.
|
|
.Pp
|
|
All of the magtape devices may be manipulated with the
|
|
.Xr mt 1
|
|
command.
|
|
.Pp
|
|
A number of
|
|
.Xr ioctl 2
|
|
operations are available
|
|
on raw magnetic tape.
|
|
The following definitions are from
|
|
.Aq Pa sys/mtio.h :
|
|
.Bd -literal
|
|
#ifndef _SYS_MTIO_H_
|
|
#define _SYS_MTIO_H_
|
|
|
|
#ifndef _KERNEL
|
|
#include <sys/types.h>
|
|
#endif
|
|
#include <sys/ioccom.h>
|
|
|
|
/*
|
|
* Structures and definitions for mag tape io control commands
|
|
*/
|
|
|
|
/* structure for MTIOCTOP - mag tape op command */
|
|
struct mtop {
|
|
short mt_op; /* operations defined below */
|
|
daddr_t mt_count; /* how many of them */
|
|
};
|
|
|
|
/* operations */
|
|
#define MTWEOF 0 /* write an end-of-file record */
|
|
#define MTFSF 1 /* forward space file */
|
|
#define MTBSF 2 /* backward space file */
|
|
#define MTFSR 3 /* forward space record */
|
|
#define MTBSR 4 /* backward space record */
|
|
#define MTREW 5 /* rewind */
|
|
#define MTOFFL 6 /* rewind and put the drive offline */
|
|
#define MTNOP 7 /* no operation, sets status only */
|
|
#define MTCACHE 8 /* enable controller cache */
|
|
#define MTNOCACHE 9 /* disable controller cache */
|
|
|
|
#if defined(__FreeBSD__)
|
|
/* Set block size for device. If device is a variable size dev */
|
|
/* a non zero parameter will change the device to a fixed block size */
|
|
/* device with block size set to that of the parameter passed in. */
|
|
/* Resetting the block size to 0 will restore the device to a variable */
|
|
/* block size device. */
|
|
|
|
#define MTSETBSIZ 10
|
|
|
|
/* Set density values for device. Sets the value for the opened mode only. */
|
|
|
|
#define MTSETDNSTY 11
|
|
|
|
#define MTERASE 12 /* erase to EOM */
|
|
#define MTEOD 13 /* Space to EOM */
|
|
#define MTCOMP 14 /* select compression mode 0=off, 1=def */
|
|
#define MTRETENS 15 /* re-tension tape */
|
|
#define MTWSS 16 /* write setmark(s) */
|
|
#define MTFSS 17 /* forward space setmark */
|
|
#define MTBSS 18 /* backward space setmark */
|
|
|
|
#define MT_COMP_ENABLE 0xffffffff
|
|
#define MT_COMP_DISABLED 0xfffffffe
|
|
#define MT_COMP_UNSUPP 0xfffffffd
|
|
|
|
/*
|
|
* Values in mt_dsreg that say what the device is doing
|
|
*/
|
|
#define MTIO_DSREG_NIL 0 /* Unknown */
|
|
#define MTIO_DSREG_REST 1 /* Doing Nothing */
|
|
#define MTIO_DSREG_RBSY 2 /* Communicating with tape (but no motion) */
|
|
#define MTIO_DSREG_WR 20 /* Writing */
|
|
#define MTIO_DSREG_FMK 21 /* Writing Filemarks */
|
|
#define MTIO_DSREG_ZER 22 /* Erasing */
|
|
#define MTIO_DSREG_RD 30 /* Reading */
|
|
#define MTIO_DSREG_FWD 40 /* Spacing Forward */
|
|
#define MTIO_DSREG_REV 41 /* Spacing Reverse */
|
|
#define MTIO_DSREG_POS 42 /* Hardware Positioning (direction unknown) */
|
|
#define MTIO_DSREG_REW 43 /* Rewinding */
|
|
#define MTIO_DSREG_TEN 44 /* Retensioning */
|
|
#define MTIO_DSREG_UNL 45 /* Unloading */
|
|
#define MTIO_DSREG_LD 46 /* Loading */
|
|
|
|
#endif /* __FreeBSD__ */
|
|
|
|
/* structure for MTIOCGET - mag tape get status command */
|
|
|
|
struct mtget {
|
|
short mt_type; /* type of magtape device */
|
|
/* the following two registers are grossly device dependent */
|
|
short mt_dsreg; /* ``drive status'' register */
|
|
short mt_erreg; /* ``error'' register */
|
|
/* end device-dependent registers */
|
|
short mt_resid; /* residual count */
|
|
#if defined (__FreeBSD__)
|
|
daddr_t mt_blksiz; /* presently operating blocksize */
|
|
daddr_t mt_density; /* presently operating density */
|
|
u_int32_t mt_comp; /* presently operating compression */
|
|
daddr_t mt_blksiz0; /* blocksize for mode 0 */
|
|
daddr_t mt_blksiz1; /* blocksize for mode 1 */
|
|
daddr_t mt_blksiz2; /* blocksize for mode 2 */
|
|
daddr_t mt_blksiz3; /* blocksize for mode 3 */
|
|
daddr_t mt_density0; /* density for mode 0 */
|
|
daddr_t mt_density1; /* density for mode 1 */
|
|
daddr_t mt_density2; /* density for mode 2 */
|
|
daddr_t mt_density3; /* density for mode 3 */
|
|
/* the following are not yet implemented */
|
|
u_int32_t mt_comp0; /* compression type for mode 0 */
|
|
u_int32_t mt_comp1; /* compression type for mode 1 */
|
|
u_int32_t mt_comp2; /* compression type for mode 2 */
|
|
u_int32_t mt_comp3; /* compression type for mode 3 */
|
|
/* end not yet implemented */
|
|
#endif
|
|
daddr_t mt_fileno; /* relative file number of current position */
|
|
daddr_t mt_blkno; /* relative block number of current position */
|
|
};
|
|
|
|
/* structure for MTIOCERRSTAT - tape get error status command */
|
|
/* really only supported for SCSI tapes right now */
|
|
struct scsi_tape_errors {
|
|
/*
|
|
* These are latched from the last command that had a SCSI
|
|
* Check Condition noted for these operations. The act
|
|
* of issuing an MTIOCERRSTAT unlatches and clears them.
|
|
*/
|
|
u_int8_t io_sense[32]; /* Last Sense Data For Data I/O */
|
|
u_int32_t io_resid; /* residual count from last Data I/O */
|
|
u_int8_t io_cdb[16]; /* Command that Caused the Last Data Sense */
|
|
u_int8_t ctl_sense[32]; /* Last Sense Data For Control I/O */
|
|
u_int32_t ctl_resid; /* residual count from last Control I/O */
|
|
u_int8_t ctl_cdb[16]; /* Command that Caused the Last Control Sense */
|
|
/*
|
|
* These are the read and write cumulative error counters.
|
|
* (how to reset cumulative error counters is not yet defined).
|
|
* (not implemented as yet but space is being reserved for them)
|
|
*/
|
|
struct {
|
|
u_int32_t retries; /* total # retries performed */
|
|
u_int32_t corrected; /* total # corrections performed */
|
|
u_int32_t processed; /* total # corrections succssful */
|
|
u_int32_t failures; /* total # corrections/retries failed */
|
|
u_int64_t nbytes; /* total # bytes processed */
|
|
} wterr, rderr;
|
|
};
|
|
|
|
union mterrstat {
|
|
struct scsi_tape_errors scsi_errstat;
|
|
char _reserved_padding[256];
|
|
};
|
|
|
|
/*
|
|
* Constants for mt_type byte. These are the same
|
|
* for controllers compatible with the types listed.
|
|
*/
|
|
#define MT_ISTS 0x01 /* TS-11 */
|
|
#define MT_ISHT 0x02 /* TM03 Massbus: TE16, TU45, TU77 */
|
|
#define MT_ISTM 0x03 /* TM11/TE10 Unibus */
|
|
#define MT_ISMT 0x04 /* TM78/TU78 Massbus */
|
|
#define MT_ISUT 0x05 /* SI TU-45 emulation on Unibus */
|
|
#define MT_ISCPC 0x06 /* SUN */
|
|
#define MT_ISAR 0x07 /* SUN */
|
|
#define MT_ISTMSCP 0x08 /* DEC TMSCP protocol (TU81, TK50) */
|
|
#define MT_ISCY 0x09 /* CCI Cipher */
|
|
#define MT_ISCT 0x0a /* HP 1/4 tape */
|
|
#define MT_ISFHP 0x0b /* HP 7980 1/2 tape */
|
|
#define MT_ISEXABYTE 0x0c /* Exabyte */
|
|
#define MT_ISEXA8200 0x0c /* Exabyte EXB-8200 */
|
|
#define MT_ISEXA8500 0x0d /* Exabyte EXB-8500 */
|
|
#define MT_ISVIPER1 0x0e /* Archive Viper-150 */
|
|
#define MT_ISPYTHON 0x0f /* Archive Python (DAT) */
|
|
#define MT_ISHPDAT 0x10 /* HP 35450A DAT drive */
|
|
#define MT_ISMFOUR 0x11 /* M4 Data 1/2 9track drive */
|
|
#define MT_ISTK50 0x12 /* DEC SCSI TK50 */
|
|
#define MT_ISMT02 0x13 /* Emulex MT02 SCSI tape controller */
|
|
|
|
/* mag tape io control commands */
|
|
#define MTIOCTOP _IOW('m', 1, struct mtop) /* do a mag tape op */
|
|
#define MTIOCGET _IOR('m', 2, struct mtget) /* get tape status */
|
|
/* these two do not appear to be used anywhere */
|
|
#define MTIOCIEOT _IO('m', 3) /* ignore EOT error */
|
|
#define MTIOCEEOT _IO('m', 4) /* enable EOT error */
|
|
/*
|
|
* When more SCSI-3 SSC (streaming device) devices are out there
|
|
* that support the full 32 byte type 2 structure, we'll have to
|
|
* rethink these ioctls to support all the entities they haul into
|
|
* the picture (64 bit blocks, logical file record numbers, etc..).
|
|
*/
|
|
#define MTIOCRDSPOS _IOR('m', 5, u_int32_t) /* get logical blk addr */
|
|
#define MTIOCRDHPOS _IOR('m', 6, u_int32_t) /* get hardware blk addr */
|
|
#define MTIOCSLOCATE _IOW('m', 5, u_int32_t) /* seek to logical blk addr */
|
|
#define MTIOCHLOCATE _IOW('m', 6, u_int32_t) /* seek to hardware blk addr */
|
|
#define MTIOCERRSTAT _IOR('m', 7, union mterrstat) /* get tape errors */
|
|
/*
|
|
* Set EOT model- argument is number of filemarks to end a tape with.
|
|
* Note that not all possible values will be accepted.
|
|
*/
|
|
#define MTIOCSETEOTMODEL _IOW('m', 8, u_int32_t)
|
|
/* Get current EOT model */
|
|
#define MTIOCGETEOTMODEL _IOR('m', 8, u_int32_t)
|
|
|
|
#ifndef _KERNEL
|
|
#define DEFTAPE "/dev/nrsa0"
|
|
#endif
|
|
|
|
#ifdef _KERNEL
|
|
/*
|
|
* minor device number
|
|
*/
|
|
|
|
#define T_UNIT 003 /* unit selection */
|
|
#define T_NOREWIND 004 /* no rewind on close */
|
|
#define T_DENSEL 030 /* density select */
|
|
#define T_800BPI 000 /* select 800 bpi */
|
|
#define T_1600BPI 010 /* select 1600 bpi */
|
|
#define T_6250BPI 020 /* select 6250 bpi */
|
|
#define T_BADBPI 030 /* undefined selection */
|
|
#endif
|
|
|
|
#endif /* !_SYS_MTIO_H_ */
|
|
.Ed
|
|
.Pp
|
|
.Sh FILES
|
|
.Bl -tag -width /dev/[nr]sa* -compact
|
|
.It Pa /dev/[nr]sa*
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr mt 1 ,
|
|
.Xr tar 1 ,
|
|
.Xr st 4
|
|
.Sh HISTORY
|
|
The
|
|
.Nm mtio
|
|
manual appeared in
|
|
.Bx 4.2 .
|
|
An i386 version first appeared in
|
|
.Fx 2.2 .
|
|
.Sh BUGS
|
|
The status should be returned in a device independent format.
|
|
.Pp
|
|
The special file naming should be redone in a more consistent and
|
|
understandable manner.
|